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使用Al₂(SO₄) ₃去除二次废水中最常见的微塑料类型和尺寸:通过模糊的Delphi方法选择变量

Nahid Azizi¹, Meghdad Pirsaheb^2,3, Nematollah Jaafarzadeh Haghighi⁴

¹Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.

Scientific reports

|November 25, 2023

概括

污水处理厂将微塑料 (MP) 释放到水生环境中. 凝固有效地去除MP,较小的聚胺MP显示出最高的去除效率.

科学领域:

环境科学环境科学
水处理工程水处理工程
分析化学分析化学

背景情况:

微塑料 (MP) 是影响水生生态系统的新兴污染物.
污水处理厂 (WWTP) 的废水是水生环境中MPs的重要来源.
了解MP的特征和去除机制对于环境保护至关重要.

研究的目的:

为了确定MP特性和有影响的凝结变量,以便从废水废水中去除.
使用专家共识 (模糊的德尔菲方法) 确定最佳的MP表征和凝血参数.
在接近全尺度的条件下使用凝固来实验评估MP去除效率.

主要方法:

对MP度,特征和凝血去除现有研究的系统审查.
模糊的德尔菲方法用于专家选择关键的MP特征和凝血变量.
实验室用硫酸和聚烯胺去除聚胺 (PA),聚烯 (PS) 和聚乙烯 (PE) MPs (尺寸<125微米和300-600微米) 的实验室瓶试验.
使用R和Excel软件对结果进行统计分析.

主要成果:

移除效率因MP类型和大小而有很大差异,从1.39% (大型PE) 到74.7% (小型PA) 不等.
与较大的MP相比,较小的MP显示出更高的删除效率.
聚胺 (PA) MP 具有比聚钢 (PS) 更高的去除效率,而聚乙烯 (PE) 的去除效率最低.

结论:

凝固是一种可行的方法,可以从废水废水中去除MP.
MP的特性,特别是尺寸和聚合物类型,显著影响移除效率.
优化凝固过程可以增强MP的去除,减轻水污染WWTPs.

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